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| #23) LM324 EFIE Part 1Tue, 30 Dec 2008 17:59:34 -0800 by rpieriniThis is the 'other' D-17-type EFIE I had mentioned as being sold on e-bay, and as I just learned, by the Hydrogen Garage. HG was kind enough to post a circuit schematic, so I wasted no time building one. Then I added in a 6-position rotary switch to adjust added voltage instead of the trimpots. The next one will get a relay instead of switches. Looks like it will work well! BTW the trace pattern I showed here has a mistake on the right side. Related: hho hydrogen efie lm324 quad-op mileage mpg |
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| #22) D17 EFIE Part 2Tue, 23 Dec 2008 20:55:55 -0800 by rpieriniInitial test results look good! I have it set to max, that is, 250mV. I plan to build one more and combine the 2 circuits, add the delay timer, change the pin connections to allow 50 - 300mV(instead of 0 - 250mV), and use a relay instead of a switch. Related: hho hydrogen efie map maf enhancer ecu d17 mileage |
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| #21) D17 EFIE Part 1Tue, 23 Dec 2008 06:37:14 -0800 by rpieriniHas anyone ever wondered about the EFIE circuit shown in D17? Well I have too- so I built one. Here's a bench demo of how it works. In the next part I'll tell you how effective it was. BTW the e-bay version I mentioned uses a different IC, he didn't combine the inputs! Related: hho hydrogen maf map enhancer efie d17 mileage |
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| #18) Hybrid Cell Design Bench TestSun, 23 Nov 2008 11:32:14 -0800 by rpieriniI hand built this funny-looking prototype to try and minimize exposed plate edge. It works well- it came out to about 1.7LPM at 11.3V, 26A- not too bad. It would have been better but the Marine Goop insulating the plate edges failed. In my next cell I'll use gaskets like a dry cell, and cut the amount of exposed plate edge in half. Related: efie hydrogen hho maf a/f sensors generator |
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| #15) $2 MAF EnhancerWed, 22 Oct 2008 16:53:13 -0700 by rpieriniAdding resistance to the signal wire of a voltage-based MAF sensor such as this hot-film type leans out the mixture. Unfortunately, the added voltage increases as the RPM insreases-but if you start low it doesn't go too high. It works for the same reason that MAP enhancers sometimes don't: because there's a voltage/current coming from both sides- i.e. from both the ECU and the sensor. Related: efie hydrogen hho maf a/f sensors |
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| #13)HHO system, CL PWMSat, 18 Oct 2008 18:02:13 -0700 by rpieriniShows the basics of an HHO system that was just installed- I was hesitant to show it yet since it's just kinda thrown together, but it will be very nice when done- will have a bigger generator and auto-refill. This generator is small and inefficient, but he's already getting a mileage gain with just 1/4LPM! Also, I have the circuit for a ZFF current-limiting PWM built, just needs to be boxed. Related: efie hydrogen hho maf a/f sensors |
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| #11) Soft-start circuit for EFIESun, 21 Sep 2008 18:56:36 -0700 by rpieriniAt this point it is possible to build a stand-alone soft start unit in which added voltage onset and ramp-up rate would be independently adjustable, and could be used to power any EFIE. This video is to demonstrate a time-delay circuit that I just added to the proportional EFIE. Added voltage onset can be delayed from 10 seconds to 10 minutes. I could also have added the voltage ramp-up rate adjuster, but didn't need it for this one. Related: efie hydrogen hho maf a/f sensors |
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| #9) Proportional EFIE demoSun, 14 Sep 2008 15:19:34 -0700 by rpieriniWhat I'm attempting to show here is an EFIE design that adds its voltage proportionally to the 02 sensor's signal. The added voltage curve can be changed, which allowed me to try some ideas. The voltage reduction at the top of the range was later eliminated, which worked better. Later I tried it with a constant increase all the way up- which seemed better yet. So at that point it was basically a %-based EFIE. Certainly not the best one, but it was a fun experiment... Related: efie hydrogen hho maf a/f sensors |
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| #8)Frequency-based MAF sensor w/resistance in groundThu, 04 Sep 2008 08:05:39 -0700 by rpieriniOK, I had to try it. Now this doesn't guarantee that it wouldn't help mileage. But the ECU just didn't seem to like it, and I'm not willing to take the chance. Also, the frequency didn't change when I added resistance. Granted, it was unlikely that it would or could. But if you have tried this and it works, please post a comment here saying so! I'll add a few Ohms and do a mileage test! Related: efie hydrogen hho maf a/f sensors |
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